Confusing documentation

[Pascal Bleyler]

Hi,

i am a bit confused like the documentation on this site:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/cvs-tags.html

because:
<quote>
...
The src tree uses tag names that start with RELENG_ tags. The ports and
doc trees use tags whose names begin with RELEASE tags. 
...
</quote>

and after this are the tags listed:

<quote>
RELENG_6_1_0_RELEASE 
FreeBSD 6.1

RELENG_6_0_0_RELEASE 
FreeBSD 6.0
...
</quote>

IMHO the src tree tag names AND the ports and doc tree tag names begin 
with RELENG but the ports and doc tree names ENDS with RELEASE!
Is this right? Can you fix this?

Thanks in advice
Pascal